Zenith Royal 500B Radio, 1956
This radio was one of the first transistor radios ever produced. The case is made of Nylon, considered "unbreakable" if compared with other plastics used for table radios like Bakelite. Made in USA by Zenith Radio Corporation from 1955. It was produced initially only in black and maroon; the ad is from 1957, when the other colors were released. This one was white, but many plastics are prone to color change through oxidation.